Sabari Narayana

Infrastructure engineer

I work on systems where the interesting problem is proving the thing you built does what you claim. A memory engine that got 5.6x faster, a token ledger that found a 40x mispricing, an audit that turned up 82 findings in production.

Selected work

Kora Graph-first memory engine for AI agents. Apache AGE and pgvector in one Postgres instance, running in your own cluster. Go · Kubernetes · Postgres · sole author 90.9 → 16.2 ms Helix Agent development environment. The upstream wire type carried only input and output tokens, so it saw 0.3% of a turn's real usage and priced it at $0.000365 instead of $0.014563. Rust · Tauri · fork 40× mispricing
Order management audit Security and correctness audit of a production order management system. Found an endpoint returning database credentials without authentication, and 99 of 127 async endpoints doing blocking I/O on the event loop. Python · FastAPI · audit 82 findings
Indic voice RAG Voice question answering over an Indic corpus. Showed with arithmetic that the brief's own sub-200ms target was unreachable with hosted speech-to-text and a hosted model, since network round trips alone exceed the budget. Python · retrieval · research <200 ms refuted